CN111893897B - Supporting device for bridge capping beam construction and bridge capping beam construction method - Google Patents

Supporting device for bridge capping beam construction and bridge capping beam construction method Download PDF

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Publication number
CN111893897B
CN111893897B CN202010812366.4A CN202010812366A CN111893897B CN 111893897 B CN111893897 B CN 111893897B CN 202010812366 A CN202010812366 A CN 202010812366A CN 111893897 B CN111893897 B CN 111893897B
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supporting
supporting leg
bearing rod
template
bearing
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CN111893897A (en
Inventor
李金恒
苏迎瑞
朱欣
朱兵
黄巍
李亚民
黄尧
曾湖庚
邓宁宇
朱向阳
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Sinohydro Bureau 8 Co Ltd
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Sinohydro Bureau 8 Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete

Abstract

The invention discloses a supporting device for bridge capping beam construction, which comprises a bearing rod and a template, wherein the bearing rod transversely penetrates through a pier stud, two ends of the bearing rod extend out of the pier stud to form bearing ends, each bearing end is provided with an underground supporting foot capable of sliding along the axial direction of the bearing rod, the bearing ends are provided with adjusting nuts at the outer sides of lower supporting feet, the top surface of each lower supporting foot is a supporting inclined surface inclining downwards towards one side of the pier stud, an upper supporting foot is supported on each supporting inclined surface, the bottom surface of each upper supporting foot is a supporting inclined surface matched with the corresponding supporting inclined surface, a supporting mold frame is arranged on the upper supporting foot at the same side of each pier stud, and the template is arranged at the top of each supporting mold frame. Also discloses a bridge capping beam construction method, which comprises the following steps: pre-burying a hole-forming sleeve and penetrating a bearing rod: mounting a lower supporting leg and an upper supporting leg; installing a mold support frame and a template; pouring cover beam concrete; demolding; and (5) removing the supporting device. The supporting device for bridge capping beam construction and the construction method are easy to disassemble and assemble, convenient to demould and capable of improving construction safety and construction efficiency.

Description

Supporting device for bridge capping beam construction and bridge capping beam construction method
Technical Field
The invention relates to the technical field of methods or equipment specially used for erecting or assembling bridges, in particular to a supporting device for bridge capping construction and a bridge capping construction method.
Background
The construction of the capping beam in the bridge engineering is a key subsection engineering, the construction methods mainly adopted by the capping beam at present are divided into a floor support construction method and a support-free construction method, and the support construction method has the defects of long erection period, limitation of ground traffic, high foundation treatment cost, uneconomic high pier construction and the like; the construction of the bracket-free method can be frequently adopted in the construction of the bent cap, and the construction of the current bracket-free method mainly comprises the following steps: staple bolt, wear the rod iron, set up pre-buried steel sheet etc. need cooperate sand box, combination shaped steel when the bent cap template is demolishd for the bent cap template is dismantled the difficulty, and it is low to dismantle construction security.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a supporting device for bridge capping beam construction and a bridge capping beam construction method, which are easy to disassemble and assemble, convenient to demould and capable of improving construction safety and construction efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a strutting arrangement is used in bridge bent cap construction, includes two piece at least bearing bars and is used for supporting the template of bent cap, each the bearing bar transversely wears to locate in the pier stud of different positions respectively, the both ends of bearing bar all stretch out from the pier stud and form the bearing end, each all be equipped with the axial that can follow the bearing bar on the bearing end and slide the underground supporting legs, the bearing end compresses tightly in the outside of lower supporting legs and is equipped with adjusting nut, the top surface of lower supporting legs is the support inclined plane of one side downward sloping towards the pier stud, it has the upper supporting foot to support on the inclined plane to support, the bottom surface of upper supporting foot is the support inclined plane with the support inclined plane adaptation, is equipped with the die carrier on the upper supporting foot of each pier stud homonymy, the top of each die carrier is located to the template.
As a further improvement of the technical scheme:
the gradient of the supporting inclined plane is more than or equal to 1: 5.
the one side of lower supporting legs and upper support foot towards the pier stud is the cambered surface with pier stud surface adaptation.
Pore-forming sleeve pipe has been buried underground in the pier stud, the bearing bar is worn to locate in the pore-forming sleeve pipe.
The pore-forming sleeve is a PVC pipe.
The inner diameter of the hole-forming sleeve is larger than the outer diameter of the bearing rod.
The mold support frame can be detachably fixed on the upper supporting leg, and the template can be detachably fixed on the mold support frame.
A bridge capping beam construction method comprises the following steps:
step S1: pre-burying a hole-forming sleeve and penetrating a bearing rod: pre-burying a pore-forming sleeve when pouring pier column concrete, penetrating a bearing rod into the pore-forming sleeve after the pier column concrete reaches the design strength, and enabling two ends of the bearing rod to respectively extend out of the pier column;
step S2: installing a lower supporting leg and an upper supporting leg: the upper supporting leg and the lower supporting leg are sleeved at two ends of the bearing rod respectively, the adjusting nuts are installed to enable the adjusting nuts to press and fasten the lower supporting leg, then the upper supporting leg is placed on the lower supporting leg, and the supporting inclined plane of the upper supporting leg is supported on the supporting inclined plane of the lower supporting leg;
step S3: installing a support die frame and a template: installing a mold support frame on the upper supporting leg, and installing a template on the mold support frame;
Step S4: pouring the cover beam concrete: pouring cover beam concrete on the template;
step S5: demolding: after the cover beam concrete reaches the design strength, the adjusting nuts are simultaneously screwed outwards by a preset distance h at two sides of the bearing rod, the upper supporting legs descend under the action of gravity, and the template is separated from the cover beam concrete;
step S6: dismantling the supporting device: and (3) removing the template, the support die frame, the upper support leg, the adjusting nut, the lower support leg and the bearing rod in sequence, and plugging the pore-forming sleeve on the pier stud.
As a further improvement of the above technical solution:
the predetermined distance h in the step S5 is 2-3 cm.
And (5) pre-pressing after the step (S3) is finished, and performing the step (S4) after the pre-pressing meets the design requirement.
Compared with the prior art, the invention has the advantages that:
the supporting device for bridge capping beam construction comprises at least two bearing rods and a template for supporting a capping beam, wherein each bearing rod transversely penetrates through pier columns at different positions, two ends of each bearing rod extend out of the pier columns to form bearing ends, each bearing end is provided with an underground supporting foot capable of sliding along the axial direction of the bearing rod, the bearing ends are tightly pressed on the outer sides of the lower supporting feet and provided with adjusting nuts, the top surface of each lower supporting foot is a supporting inclined surface inclining downwards towards one side of each pier column, the upper supporting feet are supported on the supporting inclined surfaces, the bottom surfaces of the upper supporting feet are supporting inclined surfaces matched with the supporting inclined surfaces, supporting mold frames are arranged on the upper supporting feet on the same side of each pier column, and the template is arranged at the tops of the supporting mold frames. During construction: pouring the bent cap concrete on the template, after the bent cap concrete reaches the design intensity, the adjusting nut is outwards screwed out by a preset distance h on both sides of the bearing rod, because the upper supporting foot and the lower supporting foot are in inclined plane contact with each other for supporting the inclined plane and the supporting inclined plane, under the action of gravity, the lower supporting foot can move outwards along the axial direction of the bearing rod along with the unscrewing of the adjusting nut, the upper supporting foot also descends, the template is separated from the bent cap concrete, and therefore the demolding is realized. The structure can fully utilize the mechanical principle, realizes demoulding by self gravity and is convenient to demould; and after demolding, removing the template, the support die frame, the upper support leg, the adjusting nut, the lower support leg and/or the bearing rod for splicing again for use. This strutting arrangement is used in bridge bent cap construction easily dismouting, the drawing of patterns of being convenient for and can improve construction security and efficiency of construction.
The invention discloses a bridge capping beam construction method, which comprises the following steps: step S1: pre-burying a hole-forming sleeve and penetrating a bearing rod: pre-burying a pore-forming sleeve when pouring pier column concrete, penetrating a bearing rod into the pore-forming sleeve after the pier column concrete reaches the design strength, and enabling two ends of the bearing rod to respectively extend out of the pier column; step S2: installing a lower supporting leg and an upper supporting leg: the upper supporting leg and the lower supporting leg are sleeved at two ends of the bearing rod respectively, the adjusting nuts are installed to enable the adjusting nuts to press and fasten the lower supporting leg, then the upper supporting leg is placed on the lower supporting leg, and the supporting inclined plane of the upper supporting leg is supported on the supporting inclined plane of the lower supporting leg; step S3: installing a support die frame and a template: installing a mold support frame on the upper supporting leg, and installing a template on the mold support frame; step S4: pouring the cover beam concrete: pouring cover beam concrete on the template; step S5: demolding: after the cover beam concrete reaches the design strength, the adjusting nuts are simultaneously screwed outwards by a preset distance h at two sides of the bearing rod, the upper supporting legs descend under the action of gravity, and the template is separated from the cover beam concrete; step S6: dismantling the supporting device: and (3) removing the template, the support die frame, the upper support leg, the adjusting nut, the lower support leg and the bearing rod in sequence, and plugging the pore-forming sleeve on the pier stud. The bridge bent cap construction method makes full use of the mechanics principle, the unloading process can be realized by means of self gravity, manual operation is reduced, construction safety is improved, dismantling efficiency is improved, repeated utilization can be dismantled, and particularly when a large number of bent caps exist, construction efficiency can be greatly improved.
Drawings
Fig. 1 is a front view structural schematic diagram of the supporting device for bridge capping beam construction of the invention.
Fig. 2 is a side view schematically showing the structure of the supporting device for bridge capping beam construction according to the present invention.
Fig. 3 is an enlarged view at a in fig. 1.
Fig. 4 is a cross-sectional view taken along line B-B of fig. 1.
Fig. 5 is a schematic structural view of the support device for bridge capping beam construction in demolding.
Fig. 6 is a flow chart of the bridge capping beam construction method of the invention.
The reference numerals in the figures denote:
1. a load-bearing bar; 11. a load bearing end; 12. adjusting the nut; 2. a capping beam; 3. a template; 4. pier studs; 41. forming a hole sleeve; 5. a lower supporting leg; 51. a support ramp; 52. a cambered surface; 53. a sliding hole; 6. an upper support leg; 61. a support ramp; 7. and (5) supporting the die frame.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 6 show an embodiment of the supporting device for bridge capping beam construction of the present invention, which comprises at least two bearing rods 1 and a template 3 for supporting a capping beam 2, wherein each bearing rod 1 transversely penetrates pier columns 4 at different positions, the both ends of bearing bar 1 all stretch out from pier stud 4 and form bearing end 11, all be equipped with on each bearing end 11 and follow bearing bar 1's axial underground supporting leg 5 that slides, bearing end 11 compresses tightly in the outside of lower supporting leg 5 and is equipped with adjusting nut 12, the top surface of lower supporting leg 5 is for the support inclined plane 51 towards one side downward sloping of pier stud 4, it has upper supporting leg 6 to support on the inclined plane 51, the bottom surface of upper supporting leg 6 is for the support inclined plane 61 with the support inclined plane 51 adaptation, be equipped with support die carrier 7 on the upper supporting leg 6 of each pier stud 4 homonymy, each top that supports die carrier 7 is located to template 3. During construction: pouring the concrete of the bent cap 2 on the template 3, after the concrete of the bent cap 2 reaches the design strength, the adjusting nut 12 is screwed out by a preset distance h from two sides of the bearing rod 1, because the upper supporting foot 6 and the lower supporting foot 5 are in inclined surface contact with the supporting inclined surface 51 and the supporting inclined surface 61, under the action of gravity, the lower supporting foot 5 can move outwards along the axial direction of the bearing rod 1 along with the unscrewing movement of the adjusting nut 12, the upper supporting foot 6 also descends, the template 3 is separated from the concrete of the bent cap 2, and therefore demolding is achieved. The structure can fully utilize the mechanical principle, realizes demoulding by self gravity and is convenient to demould; and after demolding, removing the template 3, the supporting template frame 7, the upper supporting foot 6, the adjusting nut 12, the lower supporting foot 5 and/or the bearing rod 1 for assembling again for use. This strutting arrangement is used in bridge bent cap construction easily dismouting, the drawing of patterns of being convenient for and can improve construction security and efficiency of construction.
In this embodiment, the slope of the supporting slope 51 is greater than or equal to 1: 5. the supporting inclined surface 51 and the supporting inclined surface 61 need to be arranged at the same gradient which is not less than 1:5, and the supporting capability and the demoulding effect of the supporting device are better within the gradient range. The inclined steel plate can be independently arranged on the slope surface, and the steel plate is smooth relatively and convenient to detach.
In this embodiment, as shown in fig. 4 and 5, one surfaces of the lower supporting leg 5 and the upper supporting leg 6 facing the pier stud 4 are the arc surfaces 52 adapted to the surface of the pier stud 4, and under the abutting action of the adjusting nut 12 on the lower supporting leg 5, the arc surfaces 52 of the lower supporting leg 5 and the upper supporting leg 6 are closely attached to the cylindrical surface of the pier stud 4, so as to improve the stability of the lower supporting leg 5 and the upper supporting leg 6.
Specifically, the upper support leg 6 and the lower support leg 5 are each composed of an arc steel plate, five vertical steel plates, a flat steel plate and an inclined steel plate. The radius of the arc steel plate is the same as that of the pier stud 4, the inner side surface of the arc steel plate is the arc surface 52, the top surface or the bottom surface of the inclined steel plate is the supporting inclined surface 51 or the supporting inclined surface 61, and a lubricant can be wiped on the inclined steel plate if necessary. The supporting die frame 7 can adopt various structures such as a Bailey beam, an I-beam, H-shaped steel and the like. The bottom of the formwork 3 is provided with a plurality of rows of I20 beams, and the I20 beams and the formwork supporting frame 7 are temporarily fixed by wedge blocks. The transverse direction as used herein is a direction perpendicular to the direction of elongation of the bridge, which is also perpendicular to the centerline of the pier 4.
In this embodiment, as shown in fig. 3 and 4, a hole-forming sleeve 41 is embedded in the pier stud 4, and the bearing rod 1 is inserted into the hole-forming sleeve 41. Specifically, the inner diameter of the hole-forming sleeve 41 is larger than the outer diameter of the bearing rod 1, so that the bearing rod 1 is movably inserted into the hole-forming sleeve 41, thereby facilitating the position adjustment of the bearing rod 1 in the hole-forming sleeve 41 and facilitating the removal of the bearing rod 1 for reuse.
In this embodiment, the perforated sleeve 41 is preferably a PVC pipe with a diameter of 100 mm. The bearing rod 1 is preferably a steel rod with a diameter of 80mm, both ends of the steel rod are provided with external threads, and the adjusting nut 12 is screwed on the external threads of the steel rod. Embedding the PVC pipe at a designed position during construction of the pier stud 4, and properly moving the position of the steel bar when the PVC pipe and the steel bar of the pier stud 4 are inevitably crossed; the wire turning is carried out in the 30cm range of the end positions at the two sides of the steel bar during the processing of a processing factory to form external threads, the adjusting nut 12 is processed in a matched mode, the distance between the non-wire-turning parts of the steel bar is not larger than the sum of the diameter of the pier stud 4 and the thickness of the lower supporting feet 5 at the two sides, and the cambered surface 52 of the lower supporting feet 5 can be tightly attached to the cylindrical surface of the pier stud 4 when the adjusting nut 12 is screwed down. The lower supporting leg 5 is provided with a sliding hole 53, and the steel bar penetrates through the sliding hole 53.
In this embodiment, the formwork support frame 7 is detachably fixed to the upper support leg 6, and the formwork 3 is detachably fixed to the formwork support frame 7. And connecting pieces (such as bolts, U-shaped clamps, wedge-shaped blocks and the like) are adopted between the support die frame 7 and the upper support legs 6 and between the template 3 and the support die frame 7 for fixed connection, so that the disassembly and the assembly are convenient.
When the width of the bent cap 2 exceeds the range of the pier stud 4 and is not more than 0.5m, the supporting device can be directly used; when the width of the bent cap 2 exceeds the range of the pier stud 4 and is more than 0.5m, a double-layer or multi-layer supporting device can be arranged, but a triangular bracket is required to be arranged.
Fig. 6 shows an embodiment of the bridge capping construction method of the present invention, which includes the following steps:
step S1: pre-burying a hole-forming sleeve 41 and penetrating a bearing rod 1: pre-burying a hole-forming sleeve 41 when pouring the pier stud 4 concrete, penetrating a bearing rod 1 into the hole-forming sleeve 41 after the pier stud 4 concrete reaches the design strength, and enabling two ends of the bearing rod 1 to respectively extend out of the pier stud 4;
step S2: installing a lower supporting leg 5 and an upper supporting leg 6: the upper supporting leg 5 and the lower supporting leg 5 are respectively sleeved at two ends of the bearing rod 1, the adjusting nut 12 is installed, the adjusting nut 12 is pressed and fastened to fix the lower supporting leg 5, the upper supporting leg 6 is placed on the lower supporting leg 5, and the supporting inclined surface 61 of the upper supporting leg 6 is supported on the supporting inclined surface 51 of the lower supporting leg 5; at this time, the arc surfaces 52 of the lower support leg 5 and the upper support leg 6 are closely attached to the cylindrical surface of the pier stud 4.
Step S3: installing a support die frame 7 and a template 3: installing a mold support frame 7 on the upper supporting leg 6, and then installing a template 3 on the mold support frame 7; the supporting die frame 7 and the upper supporting leg 6, and the template 3 and the supporting die frame 7 are fixedly connected by adopting connecting pieces (such as bolts, U-shaped clamps, wedge-shaped blocks and the like).
Step S4: and (3) pouring concrete of the bent cap 2: pouring concrete of the cover beam 2 on the template 3;
step S5: demolding: as shown in fig. 5, after the concrete of the bent cap 2 reaches the designed strength, the adjusting nuts 12 are simultaneously screwed outwards from the two sides of the bearing rod 1 for a preset distance h, the upper supporting legs 6 descend under the action of gravity, and the template 3 is separated from the concrete of the bent cap 2; when the adjusting nut 12 is screwed out, the upper supporting leg 6, the supporting die frame 7 and the template 3 force the lower supporting leg 5 to move outwards by means of dead weight and abut against the adjusting nut 12, so that a certain gap is generated between the template 3 and the cover beam 2, and when the gap reaches 1-2cm, the adjusting nut 12 can be stopped being screwed out.
Step S6: dismantling the supporting device: and (3) sequentially removing the template 3, the supporting template frame 7, the upper supporting leg 6, the adjusting nut 12, the lower supporting leg 5 and the bearing rod 1, and plugging the pore-forming sleeve 41 on the pier stud 4.
The bridge bent cap construction method makes full use of the mechanics principle, the unloading process can be realized by means of self gravity, manual operation is reduced, construction safety is improved, dismantling efficiency is improved, the bridge bent cap construction method can be used repeatedly, and particularly when a large number of bent caps 2 exist, construction efficiency can be greatly improved.
In this embodiment, the predetermined distance h in step S5 is 2 to 3 cm. After the concrete of the bent cap 2 reaches the designed strength, the adjusting nuts 12 are simultaneously screwed out by 2-3cm from both sides of the bearing rod 1, the upper supporting feet 6 slowly descend by 1-2cm under the action of gravity, the template 3 is separated from the concrete of the bent cap 2, and a space for dismantling the template 3 and the template support frame 7 is reserved.
In this embodiment, after step S3 is completed, pre-pressing is performed, and after the pre-pressing meets the design requirement, step S4 is performed. After the formwork support 7 and the formwork 3 are installed, the strength of the formwork needs to be checked, a surcharge preloading method is generally adopted, preloading is carried out according to 120% dead load, and precast concrete blocks are adopted for preloading.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (10)

1. The utility model provides a strutting arrangement is used in construction of bridge bent cap which characterized in that: the bearing device comprises at least two bearing rods (1) and a template (3) used for supporting a bent cap (2), wherein each bearing rod (1) transversely penetrates through pier columns (4) at different positions, two ends of each bearing rod (1) extend out of the pier columns (4) to form bearing ends (11), each bearing end (11) is provided with an underground supporting leg (5) capable of sliding along the axial direction of the bearing rod (1), the bearing ends (11) are tightly pressed on the outer side of a lower supporting leg (5) to form an adjusting nut (12), the top surface of the lower supporting leg (5) is a supporting inclined surface (51) inclining downwards towards one side of the pier column (4), an upper supporting leg (6) is supported on the supporting inclined surface (51), the bottom surface of the upper supporting leg (6) is a supporting inclined surface (61) matched with the supporting inclined surface (51), and a supporting mold base (7) is arranged on the upper supporting leg (6) at the same side of each pier column (4), the template (3) is arranged at the top of each mold support frame (7).
2. The supporting device for bridge capping beam construction according to claim 1, wherein: the gradient of the supporting inclined plane (51) is more than or equal to 1: 5.
3. The supporting device for bridge capping beam construction according to claim 1, wherein: the lower supporting leg (5) and the upper supporting leg (6) are cambered surfaces (52) matched with the surface of the pier stud (4) towards one surface of the pier stud (4).
4. The supporting device for bridge capping beam construction according to claim 1, wherein: pore-forming sleeve pipe (41) have been buried underground in pier stud (4), bearing bar (1) wears to locate in pore-forming sleeve pipe (41).
5. The supporting device for bridge capping beam construction according to claim 4, wherein: the pore-forming sleeve (41) is a PVC pipe.
6. The supporting device for bridge capping beam construction according to claim 4, wherein: the inner diameter of the pore-forming sleeve (41) is larger than the outer diameter of the bearing rod (1).
7. The supporting device for bridge capping beam construction according to any one of claims 1 to 6, wherein: the formwork support frame (7) can be detachably fixed on the upper supporting leg (6), and the template (3) can be detachably fixed on the formwork support frame (7).
8. The bridge capping beam construction method is characterized by comprising the following steps:
step S1: pre-burying a pore-forming sleeve (41) and penetrating a bearing rod (1): pre-burying a hole-forming sleeve (41) when pouring concrete of the pier stud (4), penetrating a bearing rod (1) into the hole-forming sleeve (41) after the concrete of the pier stud (4) reaches the design strength, and enabling two ends of the bearing rod (1) to respectively extend out of the pier stud (4);
step S2: installing a lower supporting leg (5) and an upper supporting leg (6): the upper supporting leg and the lower supporting leg (5) are sleeved at two ends of the bearing rod (1) respectively, an adjusting nut (12) is installed, the adjusting nut (12) is pressed to fasten the lower supporting leg (5), the upper supporting leg (6) is placed on the lower supporting leg (5), and a supporting inclined plane (61) of the upper supporting leg (6) is supported on a supporting inclined plane (51) of the lower supporting leg (5);
Step S3: installing a mold support frame (7) and a template (3): installing a mold support frame (7) on the upper supporting leg (6), and then installing a template (3) on the mold support frame (7);
step S4: pouring concrete of the bent cap (2): pouring concrete of the cover beam (2) on the template (3);
step S5: demolding: after the concrete of the bent cap (2) reaches the designed strength, the adjusting nuts (12) are simultaneously screwed outwards by a preset distance h at two sides of the bearing rod (1), the upper supporting legs (6) descend under the action of gravity, and the concrete of the formwork (3) is separated from the concrete of the bent cap (2);
step S6: dismantling the supporting device: the template (3), the support die frame (7), the upper support leg (6), the adjusting nut (12), the lower support leg (5) and the bearing rod (1) are sequentially removed, and the pore-forming sleeve (41) on the pier stud (4) is blocked.
9. The bridge capping beam construction method according to claim 8, wherein: the predetermined distance h in the step S5 is 2-3 cm.
10. The bridge capping beam construction method according to claim 8, wherein: and (5) pre-pressing after the step (S3) is finished, and performing the step (S4) after the pre-pressing meets the design requirement.
CN202010812366.4A 2020-08-13 2020-08-13 Supporting device for bridge capping beam construction and bridge capping beam construction method Active CN111893897B (en)

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